摘要:

This paper presents a model for the optimization of machining conditions in a multi-pass turning operation. Both rough cutting and finishing cutting are considered in the model and dual optimization of cost functions for each subproblem is pursued. The preventive tool replacement strategy used in practice is incorporated. Machining idle time is also regarded as a variable. After practical constraints are established, optimization is carried out using the dynamic programming method. An example illustrates the formulation of the problem and the optimization procedure

ISSN:0020-7543    

DOI:10.1080/00207549208948198

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

This study examines the relationship between the introduction of new products and R&D process and product expenditures of 15 industries. The objective is to determine the degree to which product and process R&D expenditures,uniquelyorjointly, contribute to the development of new products. The findings suggest that concurrent R&D expenditures on products and processes lead to higher R&D output, as measured by new product announcements, than R&D expenditures on products or processes alone. As a by-product, the analysis clearly shows that the relationship between the number of new products introduced and product and process R&D expenditures can be represented by a function resembling the Cobb-Douglas production function

ISSN:0020-7543    

DOI:10.1080/00207549208948199

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

摘要:

We consider the hierarchical production planning model introduced by Gershwin. In the hedging point strategy, we present some refinements of the capacity sets that ensure consistency of the decomposition

ISSN:0020-7543    

DOI:10.1080/00207549208948200

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

ISSN:0020-7543    

DOI:10.1080/00207549208948201

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

ISSN:0020-7543    

DOI:10.1080/00207549208948203

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

ISSN:0020-7543    

DOI:10.1080/00207549208948204

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor

ISSN:0020-7543    

DOI:10.1080/00207549208948205

出版商:Taylor & Francis Group    

年代:1992

数据来源: Taylor